The National Weather Service has issued an excessive heat warning that will be in effect until Thursday evening. John Howell welcomes Mark Thibodeau, Broadcast Meteorologist for The Weather Channel, to discuss the heat conditions and how to stay cool and safe.

<p>The National Weather Service has issued an excessive heat warning that will be in effect until Thursday evening. John Howell welcomes Mark Thibodeau, Broadcast Meteorologist for The Weather Channel, to discuss the heat conditions and how to stay cool and safe.</p>

John Howell is a veteran Chicago radio host, avid golfer, and music aficionado who breaks down the news of the day with local tastemakers and newsmakers from 4pm-7pm weekdays on 890 WLS-AM. A voice of reason, John examines the biggest stories through a Chicago lens and shares them with a nuanced delivery.

<p>John Howell is a veteran Chicago radio host, avid golfer, and music aficionado who breaks down the news of the day with local tastemakers and newsmakers from 4pm-7pm weekdays on 890 WLS-AM. A voice of reason, John examines the biggest stories through a Chicago lens and shares them with a nuanced delivery.</p>